Growing guide · Home growing: windowsill, balcony and terrace
Rosemary
Salvia rosmarinus (Rosmarinus officinalis)
An evergreen shrubby herb for a large pot; needs warmth and sharp drainage and hates wet roots.
Key figures
| Item | Value | Source |
|---|---|---|
| Pot size | at least 30 cm wide and deep | [1] |
| Seed rate / spacing | at least 45 cm | [1] |
| Winter | established plants in the UK down to −8 °C; potted plants are more vulnerable | [1] |
| Light | at least 6 h sun; indoors about 12 h artificial light | [2] |
| pH | herbs generally 6.0–7.5 | [2] |
The full guide (care, pests, beginner and professional tips) is currently in Finnish. The figures above are the same and come from the sources below.
These are general guidelines. Always check the variety, seed packet or fertiliser instructions and current regulations.